SRAM
MT5C2561
Austin Semiconductor, Inc.
256K x 1 SRAM
PIN ASSIGNMENT
SRAM MEMORY ARRAY
(Top View)
AVAILABLE AS MILITARY
SPECIFICATIONS
• SMD 5962-88725
• SMD 5962-88544
• MIL-STD-883
24-Pin DIP (C)
(300 MIL)
A6
A7
A8
1
2
3
4
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
A5
A4
A3
A2
FEATURES
A9
• High Speed: 35, 45, 55, and 70
• Battery Backup: 2V data retention
• Low power standby
• High-performance, low-power, CMOS double-metal
process
• Single +5V (+10%) Power Supply
• Easy memory expansion with CE\
• All inputs and outputs are TTL compatible
A10
A11
A14
A15
A0
A1
A17
A16
A13
A12
D
Q
WE\ 11
Vss 12
CE\
28-Pin LCC (EC)
OPTIONS
• Timing
MARKING
3
2 1 28 27
26
25
24
23
22
21
20
19
18
35ns access
45ns access
55ns access
70ns access
-35
-45
-55*
-70*
NC
A4
NC
A9
A10
A11
A14
A15
A0 10
Q 11
NC 12
4
5
6
7
8
9
A3
A2
A1
A17
A16
A13
NC
• Package(s)
13 14 15 16 17
Ceramic DIP (300 mil)
CeramicLCC
C
EC
No. 106
No. 204
• Operating Temperature Ranges
Industrial (-40oC to +85oC)
IT
XT
GENERAL DESCRIPTION
Military (-55oC to +125oC)
The Austin Semiconductor SRAM family employs
high-speed, low-power CMOS and are fabricated using double-
layer metal, double-layer polysilicon technology.
• 2V data retention/low power
L
For flexibility in high-speed memory applications,
Austin Semiconductor offers chip enable (CE\) on all organiza-
tions. This enhancement can place the outputs in High-Z for
additional flexibility in system design. The x1 configuration
features separate data input and output.
*Electrical characteristics identical to those provided for the 45ns
access devices.
Writing to these devices is accomplished when write
enable (WE\) and CE\ inputs are both LOW. Reading is accom-
plished when WE\ remains HIGH and CE\ goes LOW. The
device offers a reduced power standby mode when disabled.
This allows system designs to achieve low standby power re-
quirements.
For more products and information
please visit our web site at
www.austinsemiconductor.com
These devices operate from a single +5V power sup-
ply and all inputs and outputs are fully TTL compatible.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
MT5C2561
Rev. 2.5 1/01
1